Expansible composite roll



GJBAEHR EXPANSIBLE COMPOSITE ROLL Filed July 2 1922 TORNEYS INVENTOR Patented May 20, 192do T FFIQE.

GEORGE BAEHR, OF IRWIN, PENNSYLVANIA.

EXPANSIBLE COMPOSITE ROLL.

Application filed July 21,

To all whom it may concern Be it known that I, GEORGE BAEHR. a citizen of the United States, and a resident of Irwin, in the county of lVestmorela-nd and State of Pennsylvania, have invented a new and useful Improvement in Expansible Composite Rolls, of which the following is specification. i

This invention relates to composite rolls. More particularly it relates to means for building up or reducing the size of the roll body upon which segmental forming members are positioned. The objects of the invention are to provide means for varying the size of the roll body, to compensate for change of size of the forming segments, and to increase or decrease the effective circumference of the forming groove or the length of any portion thereof, whereby to vary the length of articles, or of certain portions thereof, finished therein.

The uses and advantages of the invention will more fully appear in the following specification and from the drawing, wherein Fig. 1 is a cross section through a composite roll; Fig. Zis a similar cross section showing the forming segments soaced away from the roll body by a special liner; Fig. 3 is an enlarged partial section on the line 3-3 of Fig. 1; Fig. 4 is an enlarged partial sec 'tion on the line H ofFigv 2; Fig. 5 is an enlarged partial section on the line 55 of Fig. 2; Figs. 6 and 7 show a modification having to do with means for compensating for lateral reduction of the forming segments, and Fig. 8 is a vertical section through a. roll showing' an additional forminn; member added thereto to fill out the gap formed in the forming members by placing a liner thereunder.

Composite rolls made up of a roll body or spindle upon which are clamped one or more series of segmental facing members, the latter having a forming groove in their surfaces adapted to shape a hot bar as it passes between the rolls. are not new. The present invention is an improvement applicable to such rolls.

When composite rolls are used for forming certain articles of varying cross section. such as crow bars, tie rods for street railway tracks, automobile axles, and. the like, it is 1922. Serial No. 576,491.

frequently desirable to slightly increase or decrease the length of the finished article, or to vary the length of one portion thereof. F or example, street railway tie rods are ordi narily made with a flattened body portion, and round end portions. threaded to extend through the web of' the tracks and carry terminalnuts. Some specifications vary the relative length ofthis threaded portion and the fiattend body portion a small amount. Therefore, it is highly desirable to be able to vary the total length of such an article, or to vary the relative lengths of the round and flattened portions. by a. small amount, without a new pair of rolls. This may be done by the present invention.

Furthermore, after such rolls have been used for a certain length of time t-hegrooves become worn, and require redressing. This is ordinarily done by machining out the old groove. In order not to increase the size of the finished product it-is necessary to turn downeither the entire flat face of the segmental members before recutting the groove, or else to turn down the meeting faces of The latter are I the two segments before recutting the' groove.

In either case a certain amount of space results and" must be taken care of. The present invention provides means for doinc: this, as Well as for slightly varying the effective size of the rolls, or the effective length of different portions of the forming groove.

Referring to the drawings, a roll body 1 is illustrated having a supporting head 2 upon which the segments are mounted. The preferred arrangement of this composite roll is shown in Figs. 3, 4, and 5, and comprises a fixed collar member 3 having an undercut beveled face 4. At the oppositeside of the roll an annular member 5 having; a correspondingr undercut portion 6 is adapted to cooperate with the fixed collar 3. Bolts 10 extend through the collar and into the roll body. and are adapted to clamp the ring member against the roll, in obvious manner. Theunder edge of these rings has a flange 7, which engages the underside of the body portion 2. as illustrated.

The preferred form of facing segments is shown in Figs. 3, 4i and 5, comprising beveled edge segments 8 and 9 arranged in cooperating pairs with the forming groove cut out from their meeting edges. Segments 8 form a semi-circular groove as shown in Figs. 3 and l, segments 9 a flattened groove, as shown in Fig.

A modification is shown in Figs. 6 and 7, in that the facing members do not have bev eled edges, but are retained under the collar 3 which has a straight-faced overlapping portion 45, and the ring 5, which has a corresponding straight-faced overlapping portion 6.

In Figs. 1 and 3 the preferred form of set up is illustrated. lVhen this roll has been used until the groove requires dressing, the segments 8 and 9 are machined oif along their meeting edges. This reduces the groove between them, which is then machined out to its former size. The result is to narrow the segments. This may be compensated for by bringing the ring 5 in closer to secure the desired clamping action. Or the dresing of the groove may be accomplished by turning down the outer faces of the segments, and then re-cutting the groove to its original size and depth. In that case a liner member 11 is positioned on the roll body beneath the segments so as to build them out to their original circumference.

In the form shown in 6 and 7, the redressing of the groove is effected by machining off the meeting edges of the segments, bringing them together, recutting the groove, and filling the resulting space by washer rings 12, as illustrated. in Fig. 7.

l Vhen it is desired to slightly increase the length of an article being rolled, this may be done byv putting the liner 11 under the facing segments as shown in Fig. 2. This builds them out and by increasing the ef fective diameter of the roll lengthens the article formed at each revolution thereof. The gap that is formed in the segments when the liner is interposed, either after turning olf the outer faces as illustrated in Fig. 4, or when the circumference of the forming face is to be actually increased. where the liner is used with segments that have not been turned down, may be filled by substituting a longer segment 8 or 9. or by adding a special segment 13 as shown in Fig. 8. Obviously this added segment may be similar to either segments 8 or 9 according to which portion of the rolled article is to be lengthened.

Thus when specifications call for tie rods of slightly greater length than those which would be made by the rolls as shown in Fig. 1, I am enabled to produce them with the same rolls, and the same segmental forming members, by removing the segments. placing a liner member 11 around the roll body, and then replacing the segments, to-

gether with an additional segment, as for example 13, or by substituting longer seg ments for some of those removed. By this means the circumference of the roll body is increased, and consequently the length of the finished rod.

lVhen the liner member 11 is added, the diameter of the carrying roll, that is to say the effective diameter of What has been referred to as the roll body is changed, and the inner faces of the segmental forming or face members will not fit exactly. But these members are made of considerable length, and it has been found that the pressure of the overhanging clamping rings, with a blow of a hammer in the outer middle face will overcome this by springing the middle of the segment inward so that it seats accurately.

I claim:

1. The combination with a composite roll comprising a roll body and removable forming segments adapted to be carried thereon, of aromovable liner member adapted to fit between the roll body and segments, whereby to vary the circumference of the roll body carrying the segments.

2. The combination with a composite roll comprising a roll spindle, a plurality of segmental. forming members adapted to be carried thereon. and a removable liner member adapted to be interposet between the roll spindle and the segments.

In a composite roll the combination of a roll spindle, a plurality of removable forming segments, and means to clamp the segments on the roll. of remjovable liner member adapted to be positioned between the roll spindle and the segments, and a special segment adapted to fill the gap in the forming surface caused by interposition of the said liner member.

in a composite roll comprising a supporting body portion and removable face members adapted to seat thereon, the combination of a removable member adapted to surround the body and be interposed be tween it and the face members. whereby to vary the diameter of the roll body.

5. A composite roll comprising a body portion having a supporting face, an overhanging undercut c llar at one edge of said face member. a removable undercut ring mounted at the other edge of the face mem' ber. means to urge the ring toward the fixed collar, removable segments having beveled edges adapted to be clamped on the support ing face by said ring and collar. and a removable liner member adapted to be interposed between the supporting face and seg' ments whereby to vary the diameter of the roll.

6. A composite roll. comprising two aclja cent series of segmental facing members forming a groove at their meeting edges, a

r011 spindle for carrying the said segments, a fixed overhanging abutment engaging the outer edges of one series of segments and a slidable overhanging ring member engaging the outer edges of the other series of segments, and a removable band member adapted to be positioned adjacent to the segments and to compensate for reduction of the segments caused by redresslng thereof.

In testlmony whereof, I slgn my name.

GEORGE BAEHR. Witness:

HELEN M. GRIFFIN. 

